Which of the following is an essential physical property of the wires used for making fuses?
low density
high thermal conductivity
low electrical resistivity
low melting point
Correct answer is D
No explanation has been provided for this answer.
The total energy required to send a unit positive charge round a complete electrical circuit is the
kinetic energy
potential difference
electromotive force
electrical energy
Correct answer is B
No explanation has been provided for this answer.
1.10\(\Omega\)
1.64\(\Omega\)
2.44\(\Omega\)
27.50\(\Omega\)
Correct answer is B
\(\frac{R_1}{R_2}\) = \(\frac{L_1}{R_2}\)
\(\frac{2}{R_2}\) = \(\frac{55}{45}\)
R = 1.64\(\Omega\)
0.26A
0.41A
0.50A
0.79A
Correct answer is C
E = 1.5v
rT = \(\frac{1 \times 1\times 1}{(1\times1)+ (1\times1) +(1\times1)}\)
E.m. f = I(R + r) = 0.33\(\Omega\)
1.5 = I(2.67 + 0.33)
I = 0.5A
Which of the following is a vector?
Electric charge
Electric field
Electrical potential difference
Electrical capacitance
Correct answer is B
No explanation has been provided for this answer.