Untitled Quiz

For a transistor connected in a common base connection, collector current is 0.95 mA and base current is 0.05 mA. Find the value of 훼:

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OFF

For normal biasing, the emitter junction of BJT has:

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OFF

The induced emf is maximum if the conductor cuts the magnetic field at:

• A. 0 degree

• B. 45 degree

• C. 90 degree

• D. 30 degree

Which one of the following is a ferromagnetic material?

• A. Nickel

• B. Lead

• C. Platinum

• D. Copper

Fleming’s left hand rule is applicable to:

• A. DC generator

• B. DC motor

• C. Alternator

• D. Transformer

If doping in the P region is high then N region:

• Depletion layer will move towards P.

• Depletion region will move towards N.

• Depletion region will remain unchanged.

• None of these

Two coils X and Y are placed in a circuit such that a current changes by 2 a in coil X and the magnetic flux changes of 0.4 Wb occurs in coil Y. The mutual inductance of the coil is:

• A. 0.2 H

• B. 1.6 H

• C. 0.05 H

• D. 0.8 H

By which law, the direction of induced emf will be identified?

• A. Faraday’s first law of electromagnetic induction

• B. Faraday’s first law of electromagnetic induction

• C. Lenz’s law

• D. Fleming’s left hand rule

In Fleming’s left hand rule thumb always represents direction of:

• A. Current flow

• B. Induced emf

• C. Magnetic field

• D. Mechanical force

Two current carrying conductors lying parallel to each other are exerting a force of attraction on each other. The currents are

• A. Low and varying

• B. High

• C. In opposite direction

• D. In the same direction