Question # 1

In the circult, the ammeter reading is 0.5 A . If the resistance of the voltmeter is 180Ohm What is the voltmeter rediang.

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90 V

100 V

180 V

900 V

In a series resonant circuit, the current at resonance is.

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Maximum

Minimum

Zero

Sometimes maximum and sometimes minimum

The unit of electrochemical potential is.

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J mol-1

volt

J C-1

Mol J-1

The picture to be transmitted must be scanned because in T.V transmission light wave are first changing into.

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sound wave

Electric fluctuations

Magnetic fluctuations

Signals

Capacitance is define das

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VC

Q/V

QV

V/Q

Inductance are measured in

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Coulombs

Volts

Henrys

Farads

In a simple D.C. motor the direction of current in the motor is reversed every half revolution to keep the motor turning in the same direction which part of the motor does this.

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Brushes

Coil

Commutator

Poles

A plug connoted to a table lamp contains a 3 A fuse Why is the fuse needed.

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To increase the resistance of the circuit

To make it easier for the current to flow

To protect the wiring form overheating

To reduce the voltage across thelamp

The relation between the voltage and current that flows in a resistor is.

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V = 1/R

R = vi

V = I2 R

I = V /R

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

Why should household appliances be connected in parallel with the voltage source.

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To increase the resistance of the circuit

To decreases the resistance of the circuit

To provide each appliance the same voltage as the power source

To provide each appliance the same current as the power source.

Two magnetic lines of force

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Out near the poles

Never cut each other

Cut at a neutral point

Cut according to position of the magnet

The typical value of forbidden energy gap in germinium is.

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0.7 eV

1.0 eV

1.4 eV

10 eV

If a charged body is moved against the electric field it will gain.

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P.E

K.E.

Electrical P.E.

Gravitational energy

Why a positive charged object is made neutral by someone touching it.

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Electrons flow from the object

Proton flow onto the object

Protons flow from the object

Proton flow onto the object

The process of converting A.C and D.C. is known as

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Amplification

_Filtration

Rectification

Saturation

if two conductors in the same vicinity each possess one coulomb of charge of opposite sign when one volt potential difference in established between them we may say they possess

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A capacitance of one henry

An inductance of one henry

An impedance of one ohm

A capacitance of one farad

When Electric current flows through the wire it increases.

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P.E of the atoms

K.E. of the atomss

Atomic size

Number of protons

Which of the following is an electrical insulator that can be polarized by an applied electric field.

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Conductor

Condenser

Di electric

Capacitor

Magnetic flux with a closed circuit depends

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Directly on number of turns of the coil

Inversely on number of turns of the coil

On geometry of the circuit

Nature of the charges

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