Question # 1

The sieman is the SI unit of

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Resistance

Specific Resistance

Conductance

Inductance

A capacitor acts as an infinite resistance for

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AC

DC

Both AC and DC

The temperature at which the speed of sound becomes double as was at 27°C is

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273°C

0°C

927°C

1027°C

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be:

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40 km/h

48 km/h

50 km/h

60 km/h

When the displacement is half of the amplitude the ratio of potential energy to the total energy is

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1/2

1/4

1

1/8

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart. with force of repulsion between the spheres to be 10^-19 N is

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25

225

625

1250

Relation between pressure (P) and energy (E) of a gas is

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P = 2/3 E

P = 1/3 E

P = 3/2 E

P = 3 E

The percentage errors in the measurements of mass and speed are 2% and 3% respectively. How much estimate of the kinetic energy obtained by measuring mass and speed

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11%

8%

5%

1%

The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is

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Double the earlier value

Unchanged

More than doubled

Less than doubled

How much water a pump of 2kW can raise in one minute to a height of 10 m. take g = 10 m/s²?

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1000 liters

1200 liters

100 liters

2000 liters

A 50-volt battery is connected across 10-ohm resistor.The current is 4.5 A.The internal resistance of the battery is

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Zero

0.5 Ω

1.1 Ω

5.0 Ω

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