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What is the force needed to lift a car, if a force of 50 N is applied to the smaller piston
of radius 5 cm ? The radius of the larger piston is 15 cm.

A) 520N B) 450 N 0 750% 0) 400%

The resistance of the carbon resistor with colour code red, yellow, red, gold is
A) Range from 2120 to 26002
8) Range from 228062 ௦ 2520௦
C) Range from 228362 ௦ 2550௦
D) Range from 2191Q to 25902

The capacitance of a parallel plate capacitor is 10 uF. What happens to the
capacitance, if the distance between the plates is reduced by half and the medium
between the plates is filled with a medium of dielectric constant, 6 ?

A) 20 uF B) 60 uF
C) 120೯ D) 10 uF

The uses of microwaves are
A) used in radar systems
B)

C) used in medical imaging
D)

used in electrical heaters

used in fibre optic communication

Find the value of the shunt resistance, if a galvanometer is converted to ammeter.
The galvanometer resistance is 10Q and it requires 5% of the main current as the
current for full-scale deflection.

A) 10௦ B) 30೧ ௦) 30೧ 0) 30
The value of Bohr radius is

A) 6.29 × 10-11 B) 5.29 x 10-1! m

C) 5.29 x 10-19 m D) 6.12 x 10-1! ‏م‎

3"
The half-life period of a radioactive substance is 30 days. What is the time for —
of the original mass to disintegrate ? 4
A) 90 days B) 60 days C) 45 days D) 50 days

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