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- The terminal p.d of a battery is 12 V when an external resistance of 20 O is connected and 13.5 V when an external resistance...(Solved)
The terminal p.d of a battery is 12 V when an external resistance of 20 Ω is connected and 13.5 V when an external resistance of 45 Ω is connected. Calculate the emf and internal resistance of the battery.
Date posted: May 11, 2021. Answers (1)
- A battery of emf 40 V and internal resistance 5 O is connected to a resistance of 15 O.
Calculate the terminal p.d(Solved)
A battery of emf 40 V and internal resistance 5 Ω is connected to a resistance of 15 Ω.
Calculate the terminal p.d.
Date posted: May 11, 2021. Answers (1)
- A cell of unknown emf E and internal resistance 2 O is connected to a 5 O resistance. If the terminal p.d V is 1.0...(Solved)
A cell of unknown emf E and internal resistance 2 Ω is connected to a 5 Ω resistance. If the terminal p.d V is 1.0 V, calculate E.
Date posted: May 11, 2021. Answers (1)
- Explain the difference between load resistance in a circuit and internal resistance in a battery.(Solved)
Explain the difference between load resistance in a circuit and internal resistance in a battery.
Date posted: May 11, 2021. Answers (1)
- Four resistors are connected as shown in figure below.
(a) Find the equivalent resistance between points a and c.
(b) What is the current in each resistor...(Solved)
Four resistors are connected as shown in figure below.
(a) Find the equivalent resistance between points a and c.
(b) What is the current in each resistor if a potential difference of 42 V is maintained between a and c ?
Date posted: May 11, 2021. Answers (1)
- Consider five resistors connected as shown in figure below. Find the equivalent resistance between points a and b.(Solved)
Consider five resistors connected as shown in figure below. Find the equivalent resistance between points a and b.
Date posted: May 11, 2021. Answers (1)
- A steel wire of cross-sectional area of 25cm2 and resistivity of 1.0 x 10-7Om. Evaluate the
resistance of 1m of the wire.(Solved)
A steel wire of cross-sectional area of 25cm2 and resistivity of 1.0 x 10-7Ωm. Evaluate the
resistance of 1m of the wire.
Date posted: May 11, 2021. Answers (1)
- What is the relationship between resistance and resistivity?(Solved)
What is the relationship between resistance and resistivity?
Date posted: May 11, 2021. Answers (1)
- Define current density and show how it is related to drift velocity.(Solved)
Define current density and show how it is related to drift velocity.
Date posted: May 11, 2021. Answers (1)
- A copper wire in a typical residential building has a cross-sectional area of 3.31 x 10-6 m2 has
8.94 x 1028 electrons/m3. If it carries a...(Solved)
A copper wire in a typical residential building has a cross-sectional area of 3.31 x 10-6 m2 has
8.94 x 1028 electrons/m3. If it carries a current of 10.0 A, what is the drift speed of the electrons?
Date posted: May 11, 2021. Answers (1)
- Explain what drift velocity is.(Solved)
Explain what drift velocity is.
Date posted: May 11, 2021. Answers (1)
- In a typical lightning bolt, a current of 2.5 x 104 A exists for 20 µs. How much charge is transferred in this event?(Solved)
In a typical lightning bolt, a current of 2.5 x 104 A exists for 20 μs. How much charge is transferred in this event?
Date posted: May 11, 2021. Answers (1)
- The current in a wire is 0.80 A. How long does it take 1.60 C to pass through a point in the wire?(Solved)
The current in a wire is 0.80 A. How long does it take 1.60 C to pass through a point in the wire?
Date posted: May 11, 2021. Answers (1)