Numerade

Markjohn L.

Viewed Questions

a. Determine an average derating factor from the curve of Fig. 58 for the region defined by temperatures between $-25^{\circ} \mathrm{C}$ and $+50^{\circ} \mathrm{C}$ b. Is it fair to say that for temperatures greater than room temperature (up to $100^{\circ} \mathrm{C}$ ), the output current is somewhat unaffected by temperature?

For the network of Fig. 28 , if $V_{B R}=6 \mathrm{V}, \mathrm{V}=40 \mathrm{V}, R=10 \mathrm{k} \Omega, C=0.2 \mu \mathrm{F}$, and $V_{G K}$ (firing potential) $=3 \mathrm{V}$, determine the time period between energizing the network and the turning on of the SCR.

Refer to the charging network of Fig. 12 a. Determine the dc level of the full-wave rectified signal if a 1: 1 transformer is employed. b. If the battery in its uncharged state is sitting at $11 \mathrm{V}$, what is the anode-to-cathode voltage drop across $\mathrm{SCR}_{1} ?$ c. What is the maximum possible value of $V_{R}\left(V_{G K} \cong 0.7 \mathrm{V}\right) ?$ d. At the maximum value of part (c), what is the gate potential of $\mathrm{SCR}_{2} ?$ e. Once $\mathrm{SCR}_{2}$ has entered the short-circuit state, what is the level of $V_{2} ?$

a. At high levels of gate current, the characteristics of an SCR approach those of what two terminal device? b. At a fixed anode-to-cathode voltage less than $V_{(B R) F^{*}}$, what is the effect on the firing of the SCR as the gate current is reduced from its maximum value to the zero level? c. At a fixed gate current greater than $I_{G}=0$, what is the effect on the firing of the SCR as the gate voltage is reduced from $V_{(B R) F^{*}} ?$ d. For increasing levels of $I_{G}$, what is the effect on the holding current?

Questions asked

ANSWERED

Timothy James

Numerade educator

A cannonball with an initial height of 1.00 meter above the ground is fired from a cannon at an angle of 50° above the horizontal. The cannonball travels a horizontal distance of 60.00 meters to a 10.00-m high castle wall and passes over 2.00 meters above the highest point of the wall. Assume that air friction is negligible. Determine how much time it takes for the cannonball to reach the wall. Answer selection: 1.80 seconds 3.08 seconds 3.51 seconds 6.15 seconds

INSTANT ANSWER

In a certain gas stove, \( 40 \% \) of the energy released in the burning fuel is used to heat the water in the pot that is placed above the stove. If \( 1.5 \mathrm{~kg} \) of water is heated from \( 35^{\circ} \mathrm{C} \) to \( 100^{\circ} \mathrm{C} \) and boil \( 0.55 \mathrm{~kg} \) of it away, how much gasoline was burned in the process, assuming that each gram of gasoline releases \( 50 \mathrm{~kJ} \) of energy? \( ^{*} \) \( \uparrow \) Add file Answer selection: \( ^{*} \quad 25 \) points \( 82.5 \mathrm{~g} \) \( 87.5 \mathrm{~g} \) \( 92.5 \mathrm{~g} \) \( 97.5 \mathrm{~g} \)

INSTANT ANSWER

In a certain gas stove, \( 40 \% \) of the energy released in the burning fuel is used to heat the water in the pot that is placed above the stove. If \( 1.5 \mathrm{~kg} \) of water is heated from \( 35^{\circ} \mathrm{C} \) to \( 100^{\circ} \mathrm{C} \) and boil \( 0.55 \mathrm{~kg} \) of it away, how much gasoline was burned in the process, assuming that each gram of gasoline releases \( 50 \mathrm{~kJ} \) of energy? \( ^{*} \) \( \uparrow \) Add file Answer selection: \( ^{*} \quad 25 \) points \( 82.5 \mathrm{~g} \) \( 87.5 \mathrm{~g} \) \( 92.5 \mathrm{~g} \) \( 97.5 \mathrm{~g} \)

INSTANT ANSWER

In a certain gas stove, \( 40 \% \) of the energy released in the burning fuel is used to heat the water in the pot that is placed above the stove. If \( 1.5 \mathrm{~kg} \) of water is heated from \( 35^{\circ} \mathrm{C} \) to \( 100^{\circ} \mathrm{C} \) and boil \( 0.55 \mathrm{~kg} \) of it away, how much gasoline was burned in the process, assuming that each gram of gasoline releases \( 50 \mathrm{~kJ} \) of energy? \( ^{*} \) \( \uparrow \) Add file Answer selection: \( ^{*} \quad 25 \) points \( 82.5 \mathrm{~g} \) \( 87.5 \mathrm{~g} \) \( 92.5 \mathrm{~g} \) \( 97.5 \mathrm{~g} \)