Electric Circuits Answers

1. A spherical conducting shell is placed in a time-varying magnetic field. Is there an induced current along the equator?
2. A rectangular loop moves across a uniform magnetic field but the induced current is zero. How is this possible?

the angular frequency 'w' of a 200v A.C source is 3.14rads–¹ .if the peak currwnt is 5A calculate the power decipated

Seven resistors, all the same value, are connected in series as shown . If the current in the circuit is 40 mA, what is the value of each resistor? (voltage= 14V)

Explain why RMS voltage value is more useful than the peak value. Show, by calculation, the peak voltage value if the effective voltage value in the UK is 230V.

Explain, with the aid of a circuit diagram, the method a student could use to investigate how the resistance of a single lamp changes with the potential difference across the lamp. [6 makrs]

I have a parallel circuit with resistors of 4 ohm and 2 ohm in a series that is parallel to a 3 ohm resistor with 4 amps next to it. No voltage listed. I need the total current, total voltage and the voltage of the 2 ohm resistor

I have a parallel circuit attached to a simple circuit. The parallel circuit resistors are 20 ohms and R2 is unknown I2 is unknown. In the simple circuit there is a resistor with 24 ohms and 4 V and the total Volts are 6V. What are the values for R2 and I2?

I have a parallel circuit attached to a simple circuit. The resistors in the parallel circuit are 20 ohms and then 2 resistors next to each other which are 20 & 40 ohms with .1A next to it. There is a 15 ohm resistor in the simple circuit attached to it. The Volt is unknown. Calculate the total current I and the total voltage V.

Illustrate, with a fully labelled graph, the difference between AC and DC electricity as seen using an oscilloscope.

What should be the equivalent resistance of it
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