# CBSE Class 11 Physics MCQs Set 15

## Physics Class 11 MCQ

Class 11 Physics students should refer to the following multiple-choice questions with answers for Physics in standard 11. These MCQ questions with answers for Grade 11 Physics will come in exams and help you to score good marks

### Class 11 Physics MCQ Questions with Answers

Question. The quality, or timbre, of a musical sound is due to...
(a) its fundamental frequency
(b) its overtone structure
(c) its amplitude
(d) the presence of beats

Question. If θ is the inclination and μs, the coefficient of static friction, then a cylinder can roll on the inclined plane without slipping for...
(a) μs ≥ tanθ
(b) μs ≥ (tanθ)/3
(c) μs ≥ (1/tanθ)
(d) μs ≥ (1/3tanθ)

Question. The moment of inertia of a rigid body is...
(a) always constant
(b) does not change generally
(c) depends on number of particles
(d) different for different axes

Question. Ball A is thrown horizontally and ball B is dropped from the same height at the same moment. Then...
(a) A reaches the ground first
(b) B reaches the ground first
(c) A has greater speed when it reaches the ground
(d) B has greater speed when it reaches the ground

Question. If for the planets in the solar system, r is the radius of the orbit and T is the periodic time, then the ratio r3/t2 is...
(a) 1
(b) same for all planets
(c) more for farther planets
(d) less for farther planets

Question. The adiabatic equation for the ideal gas, PVγ = constant can also be written as...
(a) PV = γ
(b) PTγ = constant
(c) Tγ/Pγ - 1 = constant
(d) PVγTγ = R

Question. In any process, the maximum amount of mechanical energy that can be converted to heat...
(a) depends only on the intake temperature
(b) depends only on the exhaust temperature
(c) depends on the compression ratio
(d) is 100%

Question. Electrical energy in the form of electric current is converted into _____ when a storage battery is charged.
(a) electrical
(b) thermal
(c) chemical
(d) light

Question. The power consumed by a resistance that obeys Ohm's law is given by...
(a) P = V2/R
(b) P = V2R
(c) P = IR
(d) P = IR2

(a) 96487 coulomb/g
(b) 96487 coulomb/mole
(c) 964870 coulomb/g
(d) 964870 coulomb/mole

Question. When the lead storage cell is fully charged, its voltage and specific gravity of electrolyte, respectively are...
(a) 2.1 V, 1.825
(b) 1.5 V, 1.825
(c) 2.1 V, 1.285
(d) 1.5 V, 1.285

Question. A voltmeter should have a very ____ resistance and should be connected in ____.
(a) large, parallel
(b) large, series
(c) small, parallel
(d) small, series

Question. I1 and I2 are currents in primary and secondary coils respectively, of a step-up transformer. Then...
(a) I1 is smaller than I2
(b) I1 is smaller than or equal to I2
(c) I1 is greater than I2
(d) I1 greater than or equal to I2

Question. If A is the area of a coil of N turns rotating with angular speed ω in a uniform magnetic field B, then the instantaneous value of e.m.f. generated in the coil is...
(a) NABω
(b) NABω sint
(c) NABω sinωt
(d) NABω cost

Question. In an LCR circuit resonance occurs at the frequency for which...
(a) XL > XC
(b) XL < XC
(c) XL - XC = 0
(d) XL = 0

Question. λ (wavelength) of visible light is...
(a) more than λ of ultraviolet light
(b) more than λ of infra-red light
(c) less than λ of X-rays
(d) more than λ of microwaves

Question. The phase difference between two waves superimposing at a point for destructive interference to occur should be...
(a) nπ
(b) 2nπ
(c) (2n + 1)π/2
(d) (2n + 1)π

Question. Diffraction in visible light is harder to observe because of...
(a) low frequencies
(b) high velocity
(c) visibility
(d) short wavelength

Question. The charge to mass ratio (specific charge) for an electron (in coulomb/kg) is approximately equal to...
(a) 1.76 x 10-11
(b) 1.76 x 1011
(c) 1.76 x 10-8
(d) 1.76 x 108

Question. If Vs is the stopping potential and e is the charge on electron, the energy required by the electron to cross over this potential difference is...
(a) Vs/e2
(b) Vs/e
(c) (Vs)2/e
(d) Vs . e

Question. The change of energy level is always accompanied by the emission or absorption of radiation depending upon the size of...
(a) the energy change
(b) the atom
(c) the nucleus
(d) the electron

Question. In the hydrogen spectrum, the series obtained in the ultraviolet region is...
(a) Balmer series
(b) Lyman series
(c) Paschen series
(d) Pfund series

Question. In an N-type semiconductor...
(a) free electron density exceeds hole density
(b) hole density exceeds free electron density
(c) free electrons are absent
(d) holes are absent

Question. A diode allows electric current...
(a) to increase
(b) to decrease
(c) to flow in one direction only
(d) to flow alternately in both directions

Question. Two forces 2i - 3j and _____ have a resultant 5i + 4j.
(a) 7i + j
(b) -3i - 7j
(c) 3i + 7j [
D] 7i + 7j

Question. If the magnitude of electromagnetic force is 1, the relative strength of strong force is...
(a) 10-2
(b) 10-1
(c) 10
(d) 102

Question. During an interaction of two particles, the changes produced in velocity are always...
(a) constant
(b) equal for both particles
(c) in opposite directions
(d) in direct proportion to their weights

Question. Which of the following is not a unit of power?
(a) joule.second
(b) watt
(c) horsepower
(d) newton.meter/second

Question. A 1 kg mass has a P.E. of 1 joule relative to the ground when it is at a height of about...
(a) 0.12 m
(b) 1.0 m
(c) 9.8 m
(d) 32 m

Question. An object in motion need not have...
(a) velocity
(b) momentum
(c) K.E.
(d) P.E.

## Tags:

Click for more Physics Study Material
 CBSE Class 11 Physics Physical World MCQs
 CBSE Class 11 Physics Units and Measurements MCQs
 CBSE Class 11 Physics Motion in a Straight Line MCQs
 CBSE Class 11 Physics Motion in a Plane MCQs
 CBSE Class 11 Physics Laws of Motion MCQs
 CBSE Class 11 Physics Work Energy and Power MCQs
 CBSE Class 11 Physics Systems of Particles and Rotational Motion MCQs
 CBSE Class 11 Physics Gravitation MCQs
 CBSE Class 11 Physics Mechanical Properties of Solids MCQs
 CBSE Class 11 Physics Mechanical Properties of Fluids MCQs
 CBSE Class 11 Physics Thermal Properties of Matter MCQs
 CBSE Class 11 Physics Thermodynamic MCQs
 CBSE Class 11 Physics Kinetic Theory MCQs
 CBSE Class 11 Physics Oscillations MCQs
 CBSE Class 11 Physics Waves MCQs

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