Exercise: Materials And Components

Questions for: Materials And Components

Thermistor is used in
A:
temperature measurement
B:
temperature control
C:
high temperature alarm circuits of devices
D:
all of the above
Answer: D
No answer description is available. Let's discuss.
📖
📝
💬
👁️
As regards ∈0 and ∈r (absolute and relative permittivity)
A:
both ∈0 and ∈r can be interpreted in terms of atomic properties of medium
B:
only ∈r can be interpreted in terms of atomic properties of medium
C:
only ∈0 can be interpreted in terms of atomic properties
D:
∈r has no physical significance
Answer: B
No answer description is available. Let's discuss.
📖
📝
💬
👁️

Assertion (A): For a magnetic material M = (μr - 1) H, where M is magnetic dipole moment/m3, H is field intensity A/m and μr is relative permeability.

Reason (R): μr can have any value from 0 to hundreds of thousands.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: C

μr is always more than 1. It cannot be 0 or less than 1.

📖
📝
💬
👁️
If m, v, r are the mass, velocity and radius of orbit of electron and h is Planck's constant, quantum condition for electron's orbit is
A:
B:
C:
D:
Answer: B

For stable circular orbit angular momentum is equal to integer times .

📖
📝
💬
👁️
The hysteresis loss is
A:
proportional to frequency
B:
independent of frequency
C:
proportional to (frequency)2
D:
proportional to
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz