Physics - Study Mode

[#701] Which component of an IED creates an electrical charge?
Correct Answer

(D) Power source

Explanation

Solution: The power source such as a Battery of an IED creates an electrical charge. An Improvised Explosive Device (IED) is a bomb constructed and deployed in ways other than in conventional military action.

[#702] A multimeter is used to measure
Correct Answer

(D) All of the above

Explanation

Solution: A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms).

[#703] Which of the following was the first theory of superconductivity?
Correct Answer

(B) London theory

Explanation

Solution: London theory was the first theory of superconductivity.

[#704] A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be
Correct Answer

(C) > P

Explanation

Solution: Aluminum has a resistivity varying from 2.65 to 2.82 × 10−8 Ω m. The resistivity of copper is generally given as: 1.72 x 10-8 Ω.m. So, since resistivity of aluminium is higher than that of copper, so power dissipated will be greater than P. this is because rest of the factors (l, A and i) are constant.

[#705] A wire carrying current is
Correct Answer

(C) Neutral

Explanation

Solution: A wire carrying current is neutral.