In April 2025
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1. A 35 𝜇𝐶 point charge is placed 32 𝑐𝑚 from an identical 32 𝜇𝐶 charge. How much work would be required to move a 0.50 𝜇𝐶 charge from a point midway between them to a point 12 𝑐𝑚 closer to either of the charges?
Find the Vrms across each of the three elements when a 10 ohms resistor, 10mH inductor and 10nF capacitor are connected in series with a 10MHz voltage source. The rms current through the circuit is 0.50A.
A base-32 number system that utilizes all the letters of the alphabet is used as a code to send message in binary form. In this code, the digit A has the decimal value 0, B has value 1, C has value 2, etc., upto Z, which has the decimal value 25. The remaining six digits in the code are represented by special symbols and punctuation marks. Decode the following message by converting the binary numbers to alphabetic characters.
0011001110 001010111010001 0100010011
ACTIVITY: fnfidng the PD
- to carry how much charge between two points having potential difference equal to 220V, 1760J of work is done?
- the EMF of a cell falls from 3 volts t 2.8 volts when its terminals are joined to n electrical load of 4 Ohms. calculate the internal resistance of the cell.
Three 30-ohm resistors are connected in parallel across a 60 – volt source.
a) What is the effective resistance of the circuit?
b) Find the total current drawn from the source.
c) Find the current through each resistor.
WHY DISTANCE IS CONSIDERED SQUARE IN COULOMB’S LAW
A capacitor has a capacitance of 33.68 pF. What potential difference would be required to store 69.82 pC?
A coil is joined in series with a pure resistor of resistance 80002 across a 100V, 50 Hz supply. The reading on a voltmeter across the coil is 45V and across the resistor is 80V. Determine the inductance and resistance of the coil. (ANS: 98.43812, 439.112 (1.398H)).
What is emf of battery.
1.what is lightning?
2.how are thunderclouds capable of producing the impressive electrical discharges that we see?
3.what happens in an electrical storm?
