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MCQs

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At room temperature, crystal of germanium, in its pure form, act as:
NETNUST Entry TestPhysicsElectronics
Crystal of germanium or silicon in its pure form at absolute zero acts as:
NETNUST Entry TestPhysicsElectronics
The use of chips in electrons is described in the form of:
NETNUST Entry TestPhysicsElectronics
The huge advances in electronics over the recent past are due to discovery and use of:
NETNUST Entry TestPhysicsElectronics
Silicon is one of the most commonly used:
NETNUST Entry TestPhysicsElectronics
Computer chips are made from:
NETNUST Entry TestPhysicsElectronics
An emf can be induced in a coil:
NETNUST Entry TestPhysicsElectromagnetic Induction
Mutual inductance M of two coils depends upon:
NETNUST Entry TestPhysicsElectromagnetic Induction
The SI unit of mutual inductance M is:
NETNUST Entry TestPhysicsElectromagnetic Induction
Emf induced in the secondary is proportional to:
NETNUST Entry TestPhysicsElectromagnetic Induction
The emf induced in the secondary coil is proportional to:
NETNUST Entry TestPhysicsElectromagnetic Induction
When we study mutual induction between two coils, the secondary coil circuit also contains:
NETNUST Entry TestPhysicsElectromagnetic Induction
The phenomenon in which a changing current in one coil induces an emf in another coil is called:
NETNUST Entry TestPhysicsElectromagnetic Induction
When we study mutual induction between the coils, the primary coil circuit also contains:
NETNUST Entry TestPhysicsElectromagnetic Induction
An induced emf acts:
NETNUST Entry TestPhysicsElectromagnetic Induction
The Lenz's law is a statement of law of conservation of:
NETNUST Entry TestPhysicsElectromagnetic Induction
When we say that the Lenz's law refers to induced currents, it means that we can apply it directly to:
NETNUST Entry TestPhysicsElectromagnetic Induction
The Lenz's law refers to:
NETNUST Entry TestPhysicsElectromagnetic Induction
The minus sign in Faraday's law:
NETNUST Entry TestPhysicsElectromagnetic Induction
The direction of induced current is always so as to oppose the cause which produces is. This is:
NETNUST Entry TestPhysicsElectromagnetic Induction
Faraday's law of electromagnetic induction has been used in the construction of:
NETNUST Entry TestPhysicsElectromagnetic Induction
If the area of a single loop of wire placed in a magnetic field with its plane perpendicular to the field of 0.5 T and its area is changed at the rate of $0.5 ms^{-1}$, then the magnitude of emf induced is:
NETNUST Entry TestPhysicsElectromagnetic Induction
The law of electromagnetic induction is related to:
NETNUST Entry TestPhysicsElectromagnetic Induction
An emf of 5V is induced in a coil of 100 turns in 0.02 sec during which time a change of flux takes place by some process. The change of flux is:
NETNUST Entry TestPhysicsElectromagnetic Induction
A loop of wire is placed in a uniform magnetic field that is perpendicular to the plane of the loop. The electromotive force is induced in the loop when its area:
NETNUST Entry TestPhysicsElectromagnetic Induction
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