Q1. Two identical resistors, each of resistance 15Ω, are connected in (i) series, and (ii) parallel, in
turn to a battery of 6V. Calculate the ratio of the power consumed in the combination of
resistors in each case.
Q2. Show how would you join three resistors, each of resistance 9 Ω so that the equivalent
resistance of the combination is (i) 13.5 Ω, (ii) 6 Ω
Q3. Two identical resistors are first connected in series and then in parallel. Find the ratio of
equivalent resistance in two cases.
Q4.
A copper wire has diameter 0.5 mm and resistivity 1.6 x 10 – 8 Ω m. Calculate the length of the
wire to make it resistance 100 Ω. How much does the resistance change if the diameter is
doubled without changing its length?
Q5.
State Ohm’s law. Draw a labelled circuit diagram to verify this law in the laboratory. If you
draw a graph between the potential difference and current flowing through a metallic
conductor, what kind of curve will you get? Explain how would you use this graoh to
determine the resistance of the conductor.
Q6. V-I graph for a conductor is as show in the figure
(i) What do you infer from this graph? (ii) State the law expressed
here
Q9. Study the V-I graph for a resistor as shown in the figure and prepare a Current (A)
table showing the values of I (in amperes) corresponding to four
different values V (in volts). Find the value of current for V = 10 volts. How can we determine
the resistance of the resistor from this graph?
1
Q10. A student plots V-I graphs for three samples of nichrome wire with resistances R1, R2 and R3.
Choose from the following the statements that holds true for this graph.
turn to a battery of 6V. Calculate the ratio of the power consumed in the combination of
resistors in each case.
Q2. Show how would you join three resistors, each of resistance 9 Ω so that the equivalent
resistance of the combination is (i) 13.5 Ω, (ii) 6 Ω
Q3. Two identical resistors are first connected in series and then in parallel. Find the ratio of
equivalent resistance in two cases.
Q4.
A copper wire has diameter 0.5 mm and resistivity 1.6 x 10 – 8 Ω m. Calculate the length of the
wire to make it resistance 100 Ω. How much does the resistance change if the diameter is
doubled without changing its length?
Q5.
State Ohm’s law. Draw a labelled circuit diagram to verify this law in the laboratory. If you
draw a graph between the potential difference and current flowing through a metallic
conductor, what kind of curve will you get? Explain how would you use this graoh to
determine the resistance of the conductor.
Q6. V-I graph for a conductor is as show in the figure
(i) What do you infer from this graph? (ii) State the law expressed
here
Q9. Study the V-I graph for a resistor as shown in the figure and prepare a Current (A)
table showing the values of I (in amperes) corresponding to four
different values V (in volts). Find the value of current for V = 10 volts. How can we determine
the resistance of the resistor from this graph?
1
Q10. A student plots V-I graphs for three samples of nichrome wire with resistances R1, R2 and R3.
Choose from the following the statements that holds true for this graph.
