Question # 1

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

Target material used in x-rays tube have following properties.

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High atomic number and high melting pouint

High atomic number and low melting pouint

Low atomic number and low melting pouint

High atomic number only

Unit of impedance is:

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Ohm

Ohm^-1

no unit

Ohm m^-1

Force on a charged particle is zero when projected at angle with magnetic field.

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0 ^o

90^o

180^o

270^o

Which consumes small power.

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Inductor

Resistor

Motor

All of these

An ECG records the _____ between points on human skin generated by electric process i the heart.

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Heart beat

Pulse rate

Pressure

Voltage

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

Which of the following converts electrical energy into mechanical energy.

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Transformer

A.C. generator

D.C. generator

D.C. motor

Reflecting mirrors in laser is used to

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Further stimulation

For producing more energetic lasers

Both (a) and (b)

None of these

In an electronic transition atom cannot emit.

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Infrared radiations

Visible radiations

Ultraviolet radiations

Gama radiations

Torque on a current carrying coil

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τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

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0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

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