Name A Choose the correct ane worth 1 point IMultiple choice q 1. SI unit of the

Question

Name A Choose the correct ane worth 1 point IMultiple choice q 1. SI unit of the resistance R" is the (a) Joule 3 (b) Coulomb (C (d) Ampere [A (a) Joule [3 c) Ohm [] 2. SI unit of the current 'is the (b) Coulomb [C mpere [A 3. The watt [W] is the unit of aPower (b) Resistance (c) Current (d) Voltage 4. Calculate the voltage difference ¼'lyB-Win the situation shown below VAB -Va)in the situation shown below 10A 20 V (d) 200 V 2 copper wire hasa radius r and a resistance ‘R . Another copper wire with same length L, has a radius of 2r (radius doubled). The resistance of the second copper wire is Hint: think about the cross-sectional area A) )l_IL (L (e) 4R 0

Explanation / Answer

Question 1) answer ) option c) ohm

Reason : S I unit of resistance is ohm

Question 2) answer) option d) ampere( A)

Reason : SI unit of current is ampere (A)

Question 3) answer) option a) Power

Reason : SI unit of power is watt (W)

Question 4) according to ohm's law

V = I*R

Given I = 10 A , R = 2 ohms

V = 10*2 = 20 V

Answer) option c) 20 V

Question 7 ) option c ) attractive

Reason : opposite poles attract each other

Question 6) since the same wire is used , resistance is constant

So, V1/V2 = I1/I2

2/1 = 1/I2

I2 = (1/2) Amperes

Answer) option b)

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