- ACarbon resistor.
- BRheostat.
- CWire wound resistor.
- DNone of these.
Explanation:
The carbon composition resistor is a type of fixed resistor that reduces or restricts the electric current flow to a certain level.

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For a given triode μ = 20. The load resistance is 1.5 times the anode resistance. The maximum gain will be
|
(a) 16 |
(b) 12 |
(c) 10 |
(d) None of the above |
A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be
|
(a) 100% |
(b) 75% |
(c) 50% |
(d) 25% |
A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
|
(a) 9 ohms |
(b) 12 ohms |
(c) 6 ohms |
(d) 8/3 ohms |
The electron in a hydrogen atom makes a transition
, where
and
are the principal quantum numbers of the two states. Assume the Bohr model to be valid. The time period of the electron in the initial state is eight times that in the final state. The possible values of n1 and n2 are
|
(a) |
(b) |
(c) |
(d) |
Which of the following is coldest planet
|
(a) Mercury |
(b) Pluto |
(c) Earth |
(d) Venus |