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The resistance of a conductor is inversely proportional to its:

area of cross-section
length
specific resistance
density

Zabeehullah
Past Papers MCQs, Physics mcqs

The rotational kinetic energy of a body is E. In the absence of external torque, if mass of the body is halved and radius of gyration doubled, then its rotational kinetic energy will be___________

0.5E
0.25E
E
2E

Zabeehullah
Past Papers MCQs, Physics mcqs

When a net force act on a body, it produces acceleration in the body in the direction of the net force which is directly proportional to the net force acting on the body and inversely proportional to its mass. This statement is called_________

newton's 2nd law of motion
newton's 1st law of motion
newton's 3rd law of motion
law of momentum

Zabeehullah
Past Papers MCQs, Physics mcqs

A LC circuit is in the state of resonance. if C = 0.1 mF and L = 0.25 henry. Neglecting ohmic resistance of circuit what is the frequency of oscillations_______

1007 Hz
100 Hz
109 Hz
500 Hz

Zabeehullah
Past Papers MCQs, Physics mcqs

A motorcycle is moving with a velocity of 80 km/h ahead of a car moving with a velocity of 65 km/h in the same direction. What is the relative velocity of the motorcycle with respect to the car ?

15 km/h
20 km/h
25 km/h
145 km/h.

Zabeehullah
Past Papers MCQs, Physics mcqs

A source of sound of frequency 1000 Hz is moving with a uniform velocity 20 m/s. The ratio of apparent frequency heard by the observer before and after the source crosses him would be : [v= 340 m/s]

9 :8
8:9
1:1
9:10

Zabeehullah
Past Papers MCQs, Physics mcqs

An astronomical telescope of magnifying power 8 is made using two lenses spaced 45 cm apart. The focal length of the lenses used are____________

F = 40 cm, f = 5 cm
F = 8 cm, f = 5 cm
F = 5 cm, f = 47 cm
F = 20 cm, f = 5 cm

Zabeehullah
Past Papers MCQs, Physics mcqs

If rotational kinetic energy is 50% of total kinetic energy then the body will be___________

ring
cylinder
hollow sphere
solid sphere

Zabeehullah
Past Papers MCQs, Physics mcqs

If the length of a wire is reduced to half, then it can hold the________

same load
one fourth load
half load
double load

Zabeehullah
Past Papers MCQs, Physics mcqs

The maximum number of electrons in a subshell for which 3 is______

14
10
8
4

Zabeehullah
Past Papers MCQs, Physics mcqs

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