Is the greater the resistance, the greater the power consumption?

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• 2. The power loss of the conductor is 20% of the transmission power when the voltage of 220 V is used in a substation. If the power loss of the conductor is to be reduced to 5% of the transmission power, what is the transmission voltage?
• 3. It is known that the linear function y = (3m + 1) x-m-1 about X 1. When m is the value, the image passes (0,2) 2. Which quadrants does the image pass through 3. Can you write out the relation between this line and another line which is symmetrical on the X axis
• 4. The resistance of a conductor is 2 ohm. What's its power when it passes 2 a current? How many joules of heat are produced in one minute?
• 5. The sum of two two digits is 68. Write the smaller two digits on the right side of the larger two digits to get a four digit number. Write the smaller two digits on the left side of the larger two digits to get a four digit number. It is known that the former four digits are 2178 larger than the latter four digits. Find the two two two digits Using 2-element linear equations
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• 7. Sequence - 1 / 3,1 / 6, - 1 / 9,1 / 12.. a general term formula sequence 2, - 6,81, - 54. A general term formula What do you think?
• 8. When the resistance of a conductor is constant, is the current proportional to the voltage or is the voltage proportional to the current?
• 9. The first column 1, 4, 9 The second column 4, 8, 12 The third column 5, 10, 15 The fourth column 10, 12, 14 What are the rows and columns of 100? Ask for different answers!
• 10. How to solve the problem that the circuit is changed from series connection to parallel connection, and the indication change of ammeter and voltmeter after moving the sliding rheostat in the circuit? It's better to have a problem-solving routine, The quantity is there, but because I don't understand it very well, the more I do it, the more confused I am.
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• 12. Household small electric welding machine 220 V and 380 V, all 220 V at home, but what's the use of 380 V?
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• 14. Looking at the figure below, the four points of ABCD on the number axis correspond to integers. If the digit a corresponding to point a, point B corresponding to B, and b-2a = 7 So which of a, B, C, D is the origin on the number axis? Explain the reason__ |__ |__ |__ |__ |__ |__ |__ |__ |__ |__ |__ |__ |_____ → A B C D
• 15. Calculate the product (1-2 / 2) (1-3 / 2) (1-4 / 2) (1-1999 1 / 2) (1-2000 1 / 2) equals () A. 1999 / 2000 B. 2001 / 2000 C. 1999 of 4000 d.2001 of 4000
• 16. As shown in the figure, in the triangle ABC, the angle a is greater than 90 degrees, BD and CE are the heights of the triangle respectively, and M is the midpoint of the edge BC, connecting De, DM and em (1) Proof: Triangle MDE is isosceles triangle (2) Try to explore: whether the triangle MDE can become a right triangle, if possible, request the BAC degree of this angle, if not, please briefly explain the reason
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• 18. Vector Cartesian coordinates. Just learned, 1. Given that a = (1,2), B = (2,3), real numbers x, y satisfy the equation XA + Yb = (3,4), find x, y 2. Given points a (- 1,1), B (- 4,5) and vector BC = 3, vector Ba, vector ad = 3, vector AB, vector AE = 1 / 2, vector AB, find the coordinates of point c.d.e 3. Given that the distance between a point B and a (5,12) on x-axis is equal to 13, calculate the coordinates of point B 4. Given that the abscissa of P is 7 and the distance from point P to point n (- 1,5) is equal to 10, calculate the ordinate of point P
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