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The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads),although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a3.20 Ωr esistance.(a) Draw a circuit diagram of the radio and its battery.Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400 Ω, and (c) when using an alkaline cell, having an internal resistance of0.200 Ω. (d) Does this difference seem significant, considering that the radio’s effective resistance is lowered when its volume is turned up
A parallel-plate capacitor has plates of area A and separation d and is charged to a potential difference of ∆V0. The charging battery is then disconnected (so the capacitor is electrically isolated) and the plates are pulled apart until their separation is 3d. Derive expressions in terms of A, d, and ∆V0 for (a) the new potential difference,(b) the initial and final stored energy, and (c) the work required to separate the plates.
An RLC circuit is connected to 60hz, 240volts a.c supply. If R=50ohms, C=100uf and M=0.12h. Calculate the power used in circuit
A battery with an internal resistance of r and an emf of 10.00 V is connected to a load resistor R=r. As the battery ages, the internal resistance triples. How much is the current through the load resistor reduced?
When a transistor operates in the active region, does the collector current, IC , respond to changes in VCC?
When a transistor operates in the active region, does the
collector current, IC , respond to changes in:
a. VCC?
b. IB?
When a transistor is saturated, is IC controlled solely by IB?
Calculate the power being consumed by a 100Ω resistive element connected across a 240V
supply.
Draw the digram and logic for Or gate.
Draw the digram and logic for ANDgate.
