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2.5.
Make a prediction on what will happen if you will double (a) the length of the wire and (b) the cross-sectional area of the wire. Then, support your answer by solving for the resistance in each of the given situation.
two groups of cells, each group containing 4 cells in series, are connected in parallel. each cell has em 1.50 v and internal resistance of 0.075 q. the external resistance of the circuit is 2.35 0. determine the current in the 2.35 resistance.
Suppose a transmitter B with antenna is emitting radio waves to receiver C at far away distance. If a receiver D that is receiving a higher frequency radio waves is placed to next to transmitter B, would there be a super imposing of the waves? Would there be interference or disturbance? What would be received by the receiver C?
A three phase 400 V, 50 Hz supply is
connected to a delta connected load
which has impedance of (15 + j12) S2 in
each phase. Find : (1) line current (2)
phase current (3) active power (4)
apparent power
A parallel connection of two resistor 5ohms and 10ohms with current 5A each from the same end point of a circuit(the connection is like a triangle),is connected in series with another resistor of 20ohms.Calculate the potential difference across 20ohms
Your oven is wired to 210V and draws 45A of current.
- What is the power of your oven?
- Power is usually sold using a price per the unit of kW-hr, which is 1000 Watts used for an hour. If you are baking a cake that takes 37 minutes to bake and the oven operates continuously, how much does it cost if Nova Scotia Power sells 1kW-hr for $0.156?
You wire three resistors in a circuit; a 110Ω, a 220Ω and a 440Ω across a 9.0V battery. Determine the current in the circuit, the current in each resistor and the voltage drop in each resistor when:
- The resistors are wired in series.
- The resistors are wired in parallel.
You have two charges, a 1.7μC charge placed at the origin and a -3.6μC charge placed 2.0m to the right. Determine where, on the line between the two charges, the electric potential difference will be zero.
You are building a cathode ray tube and you need to ensure that the electron gun emits electrons at 4500000m/s; if the field in the electron gun is created by two plates separated by 5.5cm, what voltage should you use?
You create a uniform electric field between two parallel plates; if the electric potential difference between the plates is 125V and the separation of the plates is 0.500m, what final velocity will a pith ball of charge 1.50nC and mass of 0.357g placed next to the positive plate attain?
