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Electric Circuits
Two charges Q1=500μC and Q2=100μC are located on the XY plane at the positions r1=3j⃗m and r2=4i⃗m. Find the force exerted on the Q2.
a. 14.4i⃗ +10.8j⃗ N
b. 14.4i⃗ –10.8j⃗ N
c. 10.8i⃗ –14.4j⃗ N
d. 10.8i⃗ +14.4j⃗ N
a. 14.4i⃗ +10.8j⃗ N
b. 14.4i⃗ –10.8j⃗ N
c. 10.8i⃗ –14.4j⃗ N
d. 10.8i⃗ +14.4j⃗ N
Electric Circuits
Two identical balls balls P and Q, each of mass 0.20 g, carry identical charges and are suspended by two threads of equal length. The balls position themselves at equilibrium such that the angle between the threads is 60 degrees. If the distance between the the balls is 0.5m, find the charge on each of them. Take g=9.8m/s^2
a. 1.1×10^−3C
b. 2.3×10^−6C
c. 1.8×10^−7C
d. 3.1×10^−5C
a. 1.1×10^−3C
b. 2.3×10^−6C
c. 1.8×10^−7C
d. 3.1×10^−5C
Electric Circuits
Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential of −6V. What potential should be applied to the upper plate to create electric field strength of 4000 V/m upwards in the space between the plates?
a. +22V
b. +10V
c. −10V
d. −22V
a. +22V
b. +10V
c. −10V
d. −22V
Electric Circuits
Points A and B each have an electric potential of +12 V. How much work would be required to take 3 C of positive charge from A to B?
a. 0 J
b. 3 J
c. 9 J
d. 36 J
a. 0 J
b. 3 J
c. 9 J
d. 36 J
Electric Circuits
A uniform electric field of 200 N/C is in the x-direction. A point charge of 3μC is released from rest at the origin. What is the kinetic energy of the charge when it is at x = 4 m?
a. 2.4×10−2J
b. 1.6×10−2J
c. 3.6×10−2J
d. 4.8×10−2J
a. 2.4×10−2J
b. 1.6×10−2J
c. 3.6×10−2J
d. 4.8×10−2J
Electric Circuits
A galvanometer of resistance
120Ω
a full scale deflection with a current of 0.0005A. How would you convert it to an ammeter that reads a maximum current of 5A?
120Ω
a full scale deflection with a current of 0.0005A. How would you convert it to an ammeter that reads a maximum current of 5A?
Electric Circuits
A battery charger supplies 10 A to charge a storage battery which has an open - circuit voltage of 5.6 V. If the voltmeter connected across the charger reads 6.8V, what is the internal resistance of the battery at this time?
Electric Circuits
Hello sir,
My question is about MOS-capacitor,
We know that, If we place +ve gate voltage on p-MOS capacitor holes are repelled from semiconductor-oxide interface leaving behind negative charge due to ionized acceptor ions,This results in a depletion region.
Now the question is, If we injected the required negative charges (electrons) into semiconductor from its back contact is the depletion region is going to vanish(neutralization)....??
My question is about MOS-capacitor,
We know that, If we place +ve gate voltage on p-MOS capacitor holes are repelled from semiconductor-oxide interface leaving behind negative charge due to ionized acceptor ions,This results in a depletion region.
Now the question is, If we injected the required negative charges (electrons) into semiconductor from its back contact is the depletion region is going to vanish(neutralization)....??
Electric Circuits
what should be the lenght of nichrome wire of resistance 4.5 ohms if the length of similar wire is 60 cm and resistance 2,5 ohms
Electric Circuits
A 8 ohm wire is doubled on itself calculate the new resistance of the wire.
