Electric Field Intensity and Electric Dipole Quiz

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What is the reason for using Constantan wire in making standard resistance?

Negligible temperature coefficient of resistance (correct)

High melting point

Low specific resistance

High specific resistance

In an electric dipole placed in a non-uniform electric field, what does it experience?

Only a torque but no force

Neither a force nor a torque

Only a force but not a torque

A force and a torque (correct)

When two resistors of 6Ω and 9Ω are connected in series to a 120V source, what is the power consumed by the 6Ω resistor?

384 W

1500 W

616 W (correct)

1800 W

If a 100W bulb operates at 200V and has resistance R, and a 200W bulb operates at 100V with resistance S, what is the ratio R/S?

1/4 Signup and view all the answers

Which graph best represents ohmic resistance?

$V$ vs $I$ with linear relationship Signup and view all the answers

If two wires of the same material have radii in the ratio 1:2 and carry current in the ratio 4:1, what is the ratio of drift speed of electrons in the two wires?

16:1 Signup and view all the answers

What is the ratio of the initial charges on the two identical conducting spheres that, when brought into contact and then separated, exhibit a repulsive force equal in magnitude to the original attractive force?

-3:8 Signup and view all the answers

What is the SI unit of electric flux?

Weber Signup and view all the answers

When a parallel plate air capacitor is half filled with a dielectric of dielectric constant 5, what is the percentage increase in capacitance?

400% Signup and view all the answers

In an equilateral triangle with charges placed at its vertices, what is the force experienced by the charge situated at vertex A in a direction normal to BC?

+Q/2πε₀a² Signup and view all the answers

In a cube where each corner has a negative charge of -q, what is the electrostatic potential energy of a charge q placed at the center of the cube?

-4q² / πε₀l Signup and view all the answers

The electric potential at a point on the x-y plane given by V = -kxy signifies ______.

An electric field pointing towards the origin Signup and view all the answers

What is the phase angle of the circuit when an inductance of $rac{1}{rac{3}{4}}$ mH, a capacitance of $rac{3}{4}$ F, and a resistance of 10$ ext{Ω}$ are connected in series to an a.c. source of 220V and 50Hz?

$\frac{\pi}{2}$ Signup and view all the answers

In a circuit with a resistor of 30$ ext{Ω}$, inductor of reactance 10$ ext{Ω}$, and capacitor of reactance 10$ ext{Ω}$ connected in series to an a.c. voltage source $e = 300 ext{V} \times 2 \sin(\omega t)$, what is the current in the circuit?

$30 \times \frac{1}{11} ext{A}$ Signup and view all the answers

If a transformer with an input of 220V has an efficiency of 80% and draws a current of 2.0A at 440V output, what is the current drawn by the primary winding?

2.8A Signup and view all the answers

For an electromagnetic wave with electric field components $E_x = 0$, $E_y = 2.5 ext{ N C}^{-1} imes \cos(2 ext{π} \times 10^6 ext{ rad m}^{-1} t - ext{π} \times 10^{-2} ext{ rad s}^{-1} x)$, and $E_z = 0$, what are the characteristics of the wave?

Moving along x direction with frequency $10^6$ Hz and wavelength 200m Signup and view all the answers

If a thin glass lens with a refractive index of 1.5 has an optical power of -5D in air, what will be its optical power in a liquid medium with refractive index 1.6?

25D Signup and view all the answers

Electric Field Intensity and Electric Dipole Quiz

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