What is the conventional direction of flow of electric current? Do the charge carriers in the conductor flow in the same direction? Explain.

What is the conventional direction of flow of electric current? Do the charge carriers in the conductor flow in the same direction? Explain.

Ans: –  There are flow of electron in the current from one point to the other point in this way the negatively charged particles transform from to the positively charged particle.

 

Out of ammeter and voltmeter which is connected in series and which is connected in parallel in an electric circuit?

Ans: – The are connected in series whereas the voltmeter is connected in parallel in circuit of electrical system.

 

You are given two resistors of 3 Ω and 6 Ω, respectively. Combining these two resistors what other resistances can you obtain?

Ans: – The resistor which can be formed by these two resistors is 9(in series) and 2 (in parallel connection).

 

What is the current in SI unit if+100 coulombs of charge flow past a pointevery five seconds?

Ans: – As we know, current(i) = Q/t;

So, current= 100/5 = 20A.

Then 20A current will transfer through the circuit.

 

Reduce an expression for the electrical energy spent in flow of current through a conductor.

Ans: – We know that, V=J/Q,

Here j is joule or heat H,

So, V=H/Q,

Or, H=VQ,

Or, H=IR×It (as, V=IR, I=Q/t)

Then, H=I^2Rt.

 

A resistor of 8 Ω is connected in parallel with another resistor of X Ω. The resultant resistance of the combination is 4.8 ohm. What is the value of resistor X?

Ans: – The equation will be,

1/8 + 1/X = 1/4.8;

Or, (8+ X)/ 8X = 1/4.8;

Or, 3.2X= 38.4;

So, X= 38.4/3.2 = 12ohm.

 

How many 132 Ω resistors should be connected in parallel to carry 5 A current in 220 V line?

Ans: – Here resistance, R= 220 / 5 = 44ohm,

Let the number of resistors is n.

By equation, 132/n =44;  or, n=3.

 

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